(a+12)/2-a=9

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Solution for (a+12)/2-a=9 equation: 



(a+12)/2-a=9

We move all terms to the left:

(a+12)/2-a-(9)=0

We add all the numbers together, and all the variables

-1a+(a+12)/2-9=0

We multiply all the terms by the denominator


-1a*2+(a+12)-9*2=0

We add all the numbers together, and all the variables

-1a*2+(a+12)-18=0

Wy multiply elements

-2a+(a+12)-18=0

We get rid of parentheses

-2a+a+12-18=0

We add all the numbers together, and all the variables

-1a-6=0

We move all terms containing a to the left, all other terms to the right

-a=6

a=6/-1

a=-6

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